Try melting the chocolate with some half & half or cream. I'm sure you know this already, but make sure you melt them both at the same time, - don't add the cream or half & half later. Actually, I'm thinking water or milk may be better, since they're thinner than half & half.
It should be at least 1 Tbsp liquid for every 2 oz chocolate.
"Strength is the capacity to break a chocolate bar into four pieces with your bare hands - and then eat just one of the pieces."